Clutch-pulley.



PATENTED SEPT. 1, 1908.

W. BAUMGARDNER. CLUTCH PULLEY. APrLmATIoN rILED un 1a, 190B.

W, 27m/manual 537%? NE1L, a

WILLIAM BAUMGARDNER, 0F ZELIENOILE, PENNSYLVANIA.

CLUTCH-PULLEY.

VSpecification of Letters Patent.

Patented Sept. 1, 1908.

Application filed 'May 13, 1908. Serial No. 432,665.

To all 'whom it may concern:

Be it known that I, WlLLrAM BAUMGARD- citizen of the United States of America, residing at Zelienople,in the county of Butler and State o'l' Pennsylvania, have invented certain new and useful Improvements in Clutch-Pulleys, oiwhich the following is a specification, reference heilig had therein to the accompanying drawing.

T his invention relates to clutches, and the primary object of my invention is to provide posltive and reliable means for grlpping a' pulley loosely mounted upon a shaft and causing said pulley to rotate therewith.

A further object ,oi this invention is to provide a simple, durable and inexpensive clutzh that can be easily and quickly operatea The above -objects are accomplished by a structure that will be presently described and then specifically pointed out in the appended claims.

Referring to the drawings forming a part of this speciiication, Figure 1 is an end view of my Clutch with the gripping shoes thereof in a retracted position. Fig. 2 is a similar view With-the shoes thereof in an extended or gripping position, Fig. 3 is a perspective view of a sleeve formi-ng part of my invention, Fig. 4 is a cross sectional view of my clutch illustrating the ulley thereof in elevation, Fig. 5 is a detail View of an adjustable toggle link, Fig. 6 is a horizontal sectional view on the line VI--VI of Fig. 1. Fig. 7 is a vertical seetional view taken on the line VII-VII of Fi 1. Fig. 8 is a vertical sectional view ta en on the line VIII of Fig. 2, Fig.l9 is a horizontal sectional view taken on the'line IX of Fig. 2, and Fig. 10 is a view of a modifled form of toggle lmk. v

In the accom anying drawings, 1 desi natos a revolub e shaft and upon this sha t there.is fixed by a screw 2 a sleeve 3 having one end provided with a gpripheral ange 4, while the opposite endv t with a recess 5 and screw threaded openings 6.

Revolubly mounted upon the sleeve 3 is a hub 7 of a pulley wheelV 8, said hub being of a less length than said sleeve. The pulley Wheel 8 is formed adjacent to the web or spokes 9 thereof with an annular enlargement 10 roviding one of the gripping surfaces of tllie clutch. g

Mounted upon the sleeve 3 is a cap ll-and secured to said cap by rivetsor pins 12 is a collar 13 having a peripheral groove 14.

ereof is provldedl Diametrically opposed edges of the collar 13 are cut away or flattened as at 15 to provide clearance for toggle links, as will presently appear. These cut away or flattened edges are provided with vertical grooves 16 for guiding a yoke employed for actuating lthe tov fle links and gripping shoes of my clutch.

lhe cap 11. and the collar 13 are fixed upon the sleeve 5 by a cross head 17, said` cross head fitting in the cap 11 and having a depending portion 18 secured in the recess 5 of the sleeve 3 by screws 19, while the ends of the cross head are secured to the cap 11 and the collar 13 by screws 20. Movably mounted in the peripheral groove 14 of the collar 13 are two oppositely disposed segment shaped gri ping shoes 21, said shoes being substantia ly T-shaped in cross section. The confronting edges of shoes 21 are slotted, as at 22 and provided with pivoted pins or screws 23 for toglgle links, each link comprises two adjustab e members 24 and 25. The members 2 5 are carried by the pins or screws 26, and the members 24 are pivotally mounted u on the pins or screws 26 arranged in the bi urcated ends 27 of a yoke 28, said yoke being movably guided in the vertical oppositely disposed rooves 16 of the collar 13.

The yo e 28 is provided with a central opening to receive a guide pin 30, and with a collar 29 against which an operating lever 32 of a conventional form is adapted to engage for moving the yoke 28. The pin 30 is rovided with a spring 31, the tension of w ic is greater than the centrifugal force of the clutch when not in operation, consequently,

the tendency oi' the gri ping shoes to move when detached from either the yoke or the gripping shoes, the clamping force ofV the shoes can be decreased or increased as may be desired, but these adjustable links are principally provided to compensate for the wear upon lthe gripping shoes and the enlargement 10 engaged by said shoes.

In Fig. 10 of the drawings, I have illustrated a modified form of to gle link, wherein the members 24 and 25 can e adjusted without detaching the same. This is accomplished by a screw 25, an apertured head 25" and a jam nut 250.

I reserve the right to make the collar 13 and the cap 11 in one piece.

It is thought that the utility and operation of my clutch will be fully understood, and while in the accompanying drawings there is illustrated a preferable form of construction embodying the invention, it is to be understood that the elements may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit of the invention,-

Having 'now described. my invention what I claim as new, is

1. A clutch embodying a revoluble shaft, a sleeve mounted thereon, a pulley wheel revolubly mounted upon said sleeve and having an interior annular enlargement providing a gripping surface, a cap mounten u on said sleeve, a collar xed to said cap, an having a peripheral groove formed therein, said collar havingv op ositely disposed out away sides rovided wit 1 vertical guide grooves, a cross liead secured to said sleeve and to said cap, a guide pin carried by said cross head, oppositely dlsposed segment shaped shoes movably mounted in the. roove of said collar and adapted to frictiona y engage said enlargement, adjustable toggle links pivotally connected to the confronting faces of said shoes, a yoke movably mounted upon said guide pin and adapted to engage in the vertical grooves ol said collar, said yoke having biurcated endsadapted to be connected to said links, and a spring carried by said guide pin between said cross head and said yoke.

2. A clutch embodying a revoluble shaft, a sleeve mounted thereon, a pulley wheel revolubly mounted upon said sleeve, a cap mounted. upon said sleeve, a collar secured to said cap, said collar having a peripheral groove ormed therein, oppositely disposed segment shaped shoes movably mounted in sald groove and adapted to frictionally engage said pulley wheel, a cross head secured to said sleeve and to said cap, a guide in carried by said cross head, a yoke movalily mounted upon said pin and havin'I bifurcated ends engaging said collar, adjustable toggle links connecting the bifurcated ends of said yoke with the confronting face of said shoes, and means arranged between said yoke and said cross head for normally holding said shoes out of engagement with said pulley wheel.

In testimony whereof I afiix my signature in the presence of two Witnesses.

WILLIAM BAUMGARDNER. Witnesses:

J. F. SOHAFFER, CHARLES STOKEY. 

